wingett



UNITED STATES PATENT OFFIC JOHN N. VINGETI, OF IVASHINGTON, PENNSYLVANIA.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 306,985, dated October 21, 1884.

Application filed March 3, 1884. (No model.)

To all whom, it may concern:

Be it known that 1, JOHN N. Wrnenrr, a citizen of the United States, residing at VVashington, in the county of WVashington and State of Pennsylvania, have invented certain new and useful Improvements in Steam-Generators, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to an improvement in steam-generators; and it consists in a tubular coil forming the grate bars, into which the water is forced by a pump or an injector, and from it led into a chamber forming the firebox, from which it passes into a chamber connected with a second coil that conducts the steam into a steam-dome from which the en gine is supplied, the whole being inclosed by a shell with an inner and an outer wall, the space between which is to be filled with a non-conducting material, as will be fully described hereinafter.

The accompanying drawings represent my invention.

Figure 1 is a vertical section of a boiler embodying my invention. Fig. 2 is a horizontal cross-section of the same,taken above the grate, 0n the line 00 y.

A represents a cylindrical shell composed of an inner and an outer wall, with an open space, B, between them for the introduction of a non-conducting material to confine the heat within the shell. The shell A stands on a flange, O, projecting inwardly. from a base formed by the ash-pit D on top of the watertank E. Over the ash-pit D is a flat tubular coil, F, that forms the gratebars, into which the water is forced by a pump, G, or by an injector. The coil Fis surrounded by the firebox I, that stands 011 the flange 0, inside the shell A, and receives the water from the coil F. From the chamber between the walls of the firebox the water passes, by the tube 12, into a chamber, a, surrounded by a second coil, H, into which the water enters through an opening, (I, and is expelled at the other end of the coil, combined with steam, by way of the opening 6 into the steam-dome K, that surrounds a central flue, L. The steam-dome K rests upon the cylinder A, and is' provided with a double roof, between which is an open space, 9, to be filled with a non-conducting material. Through the roof of the dome is a passage, f, through which steam is supplied to the engine.

Having thus described my invention, I claini 1. The combination of the tubular coil F, which forms the grate, the force-pump, to which the lower end of the coil is attached, and the water-tank E, located in the base, and in which the pump is placed, substantially as shown.

2. The arrangement of the water-tank E, force-pump G, coil F, fire-chamber I, pipe I), chamber 0, coil H, and steam-dome K, sub stantially as described.

8. The combination of the double -walled shell A, the steam-dome K, having the double cover g, and flanges to catch down over the top of the shell, the steam-dome being placed inside of the top of the shell, and having the pipe L made through it, substantially as set forth.

In testimony whereof I affiX my signature in presence of two witnesses.

J OHN N. XVINGETT.

\Vitnesses:

LOUIS MoEsER, WiLH. VoLBERs. 

